== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:51:58 (1780329118)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.52274 s, 16.1 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff936f894bf800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.666058
Iter 1/10: OSS cache speed: 0.812448
Iter 1/10: ladvise speed: 0.784078
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.9223
Iter 2/10: OSS cache speed: 0.868767
Iter 2/10: ladvise speed: 0.854627
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.884483
Iter 3/10: OSS cache speed: 1.0347
Iter 3/10: ladvise speed: 0.188558
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.279224
Iter 4/10: OSS cache speed: 0.439156
Iter 4/10: ladvise speed: 0.480231
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.349771
Iter 5/10: OSS cache speed: 0.348742
Iter 5/10: ladvise speed: 0.316734
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.432303
Iter 6/10: OSS cache speed: 0.493545
Iter 6/10: ladvise speed: 0.556148
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.638789
Iter 7/10: OSS cache speed: 0.776741
Iter 7/10: ladvise speed: 0.584105
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.24181
Iter 8/10: OSS cache speed: 0.392354
Iter 8/10: ladvise speed: 0.392499
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.317312
Iter 9/10: OSS cache speed: 0.348373
Iter 9/10: ladvise speed: 0.359333
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.281544
Iter 10/10: OSS cache speed: 0.320347
Iter 10/10: ladvise speed: 0.356045
Average uncached read: .50
Average speedup with OSS cached read:  .58 = +16%
Average speedup with ladvise willread:  .48 = +-4%
Speedup with OSS cached read less than 20%,  got 16%. Skipping ladvise willread check.
fail_loc=0